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POAndroid - Show textview by clicking on listview item
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  1. POAndroid - Show textview by clicking on listview item
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    copied!<p>I am creating my very first Android application, but i stuck unfortunately. The application would be very simple: On the starting page there is a ListView with items like: 1st group 2nd group 3rd group ...</p> <p>By clicking on any of these items a new page would show up with a single textview element that would have some description. Like you click on '1st group' item, the listview gets hidden, and a new page appears with '1st group description' text.</p> <p>So far I can show the listview with the items, but when I click on them, nothing happens (i guess I miss some basic stuff, but as a very newby, i cannot find it out easily).</p> <pre><code>import java.util.ArrayList; import java.util.Arrays; import android.app.Activity; import android.os.Bundle; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.LinearLayout; import android.widget.LinearLayout.LayoutParams; import android.widget.ListView; import android.widget.TextView; import android.view.*; public class SimpleListViewActivity extends Activity { LinearLayout.LayoutParams layoutParams; LinearLayout ll; private ListView mainListView ; private ArrayAdapter&lt;String&gt; listAdapter ; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Find the ListView resource. mainListView = (ListView) findViewById( R.id.mainListView ); // populate the List of groups String[] GROUP = getResources().getStringArray(R.array.group); ArrayList&lt;String&gt; GrList = new ArrayList&lt;String&gt;(); GrList.addAll( Arrays.asList(GROUP) ); // Create ArrayAdapter using the list. listAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.simplerow, GrList); // Set the ArrayAdapter as the ListView's adapter. mainListView.setAdapter( listAdapter ); ll = (LinearLayout)findViewById(R.id.LinearLayout); layoutParams = new LinearLayout.LayoutParams (LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); mainListView.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { TextView t = (TextView) findViewById(R.id.textView1); String[] DESC = getResources().getStringArray(R.array.desc); t.setText(DESC[position]); ll.addView(t); //This is the point that is wrong for sure (and others maybe also). I cannot get the textview shown } }); } } </code></pre> <p>Thanks for your help.</p>
 

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